Our project is using asymmetric encryption with nacl.box and ephemeral keys: We presently have node.js apps that then decrypt these messages. We would like the option to use jvm languages for some features. There does not seem to be the richness of established players for tweet-nacl on the jvm but it seems tweetnacl-java https://github.com/InstantWebP2P/tweetnacl-java and its recommended implementation ° tweetnacl-fast